Here is a preview of coming NLE systems for us day-dreamers.
"Nehalem-EX is planned to be an eight-socket system that will have 64 processor cores and 128 threads, supporting terabytes of main memory."
Imagine that no disk drives necessary.
Since Vista and Windows 7 are limited to two sockets licensing might be a problem.
"...the Nehalem-EX processor will feature up to eight cores inside a single chip supporting 16 threads..."
I'd take that even in a single socket system.